Finally got to paint the plastic this week. I scuffed thoroughly with the scuff paste, cleaned with water w&gr, one thin coat ad pro, and epoxy 1:1:1 prior to base. Only problem was static which makes the plastic a lint/duct magnet. I painted lots of plastic over the years (not much auto parts), and I find the static goes away after the first coat or two, sand the nerds out. On these parts I didn't want to sand the epoxy and compromise it or the ad- pro so I put two coats of SPI intercoat base activated , let that set a few hours and wet sanded that. It was good after that, base, clear and done. The base wasn't as easy to wet sand as epoxy or 2k but it worked out.
Maybe next time I'll go 2 coats epoxy 1:1 let it be for a day or two then seal with epoxy 1:1:1 prior to paint .